Science / Biology / Species Packing: The phenomenon in which present-day communities generally contain more species than earlier communities because organisms have evolved more adaptations over time. MORE

Science / Marine Biology / Species-Area Effect: A regular logarithmic relationship between the number of species in a confined geographic area (e.g., an island) and the area in which the species occur MORE

Science / Biology / Subspecies: A taxonomic subdivision of a species; a population of a particular region genetically distinguishable from other such populations and capable of interbreeding with them. MORE